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A037652 Decimal expansion of a(n) is given by the first n terms of the periodic sequence with initial period 3,0,1. 0
3, 30, 301, 3013, 30130, 301301, 3013013, 30130130, 301301301, 3013013013, 30130130130, 301301301301, 3013013013013, 30130130130130, 301301301301301, 3013013013013013 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..16.

Index entries for linear recurrences with constant coefficients, signature (10,0,1,-10).

FORMULA

a8n)=10*a(n-1)+(1/9)*{(n mod 3)+13*[(n+1) mod 3]-2*[(n+2) mod 3]}, with a(0)=0 [From Paolo P. Lava, Jul 30 2009]

G.f. x*(3+x^2) / ( (x-1)*(10*x-1)*(1+x+x^2) ). - R. J. Mathar, Aug 04 2013

CROSSREFS

Sequence in context: A093138 A073557 A037764 * A037771 A037659 A131586

Adjacent sequences:  A037649 A037650 A037651 * A037653 A037654 A037655

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified May 25 00:59 EDT 2019. Contains 323534 sequences. (Running on oeis4.)